Indicators displays using LEDs instead of filament lamps

摘要

There has been a trend for many years to supply indicator displays using Light Emitting Diodes (LEDs) instead of filament lamps. The life of the filament lamp is limited due to physical reasons, the high temperature generated leads to problems in most applications. Almost 95% of the energy used will be transformed into heat. LEDs, however, have a very long life with only small radiation of heat.